Rail-bolt



lll

i0, ASSIGNGR T0 WEIR FROG COMPANY, 0F

BAIL-BGHR Application filed January 14,

"Z 'af/icm it' may concern.' La it known that l, Meer o'. Mawson, citizen ci? United States, and resident oi" lorwood, ML...hilt-on county, Ohio, have invented certain new and usetul improvei iolts, of which the ollowa Alull, clear, and exact description, i ence being had to the accompanying drawings, forming a part of this specification.

My invention relates to bolts for securing lish pla-tes to railroad rails or in a wide variety ot uses in connection with anged rails and structures in railroad `practice, my object being to provide a novel flanged head for such bolts.

l am aware that there bolts on the market tor railroad practice which have iianged heads to between the fianges oi' rails and against the webs thereof, or sonic structure p; ced against the webs, but to my linowlef ge the types ot such bolts use do not fully provide for the necessary itunctions.

Thus a rectangular shaped head or iior a bolt will frequently find a bearir 1' neath the hn or ball ot a rail at one e c or corner l "i because oi? unevenness olf the rail, and because oi the width ot the space betveen the rail head and base.

s derable degree of looseness resultconsi ing from a rectangular bolt flange being too small will perniit the head to turn with the resultant dangerous condition ot looseness` in the rail joint frog or what not, due to the fact that the radial line from the center oi the bolt to the two corners of the ilange will be equal, so that if one corner will pass, the other will do so also.

According to my invention, however, the bolt head flange is shaped as a non-rectangular p rallelogram, thereby providing for a greater length of the line of contact of the vflange of the boh with the rail head and base, and also providing for a flange which can not turn more than haii' a revolution if it becomes loose at one corner. Such a structure also provides for flange which will have a fast engagement in rails which are considerably larg r size than the rails for which the particular bolts were designed.

I accomplish my object by that certain construction and arrangement o parts 'to Specification of Letters Patent.

Patented Apr. 20, 1920.

Serial o.

hereinafter more specifically pointed out and claimed.

ln the' drawings, Figure l is a side elevation illustrating fails being shown in dotted lines.

` 2 is a Jrace view of the bolt head in the bolt in use with a rail, with oversizedr Fig. 3 is a perspective view of the bolt.

The bolt is shown as employed for securing rails at the joints by means or a fish plate. This is, of course, not the only use to which my invention may be put, as will be obvious to those skilled in the art.

The rail is indicated at l, and the fish plate at 2, there being dotted lines showing larger sized rails at 3 and l-(Fig. l.)

The bolt has a shank 5, with a threaded end G of any desired character, and near the head the bolt is provided with a wide parallelograin shaped portion 7, having considmore length than width, and nonguiar in torri. The head 8 of the is 'formed on the outside of the 'Piange )arallelogram portion, which maires for '3 method of manufacture, and turthermore, enables me to present a flat surface to devices held against the webs ot rails by means of the bolt ilanges.

lllhen set against the side of a rail, the tiange of the bolt will lie with its short dimension abutting along the head. and base ot t ie rail in such a way as to bring that portion of the flange which is a greater radial distance 'from the center oi'i' the boltl very firmly against the said base and head. T he nuts when turned up on the bolts tend to twist the heads in the direction indicated by the arrow A.

Great force is applied to the tightening up of rail bolts, and irn a mere corner was in Contact with the head end base oiLl the rail, this corner, or corners, would tend to be burred over by the twisting strain.

is is further evident, even if the corners the nearest the bolt center were n contact at all with the head and base aib still the projecting portions ot' ge would be. lf/Ioreover, should e3:-

ve looseness of the bolt cause it to turn on its axis in a direction opposite to the arrow A, then although the corners B on the short radius of the iange would possibly turn freely, still after a haltl or partial turn had' taken place the corners on the long radius .would come into fast Contact, and

ystop the bolt head from turning further.

Having thus described my invention, What I claim as ne7 and desire to secure b v Letters Patent is,-

l. A rail bolt comprising a shank and a flanged portion rigid With the shank, and having a Hat Contact face, said face not being at a right angle to the radial line flanged portion integral with the shank, and a bolt head, said hanged portion lying between the bolt head and the shank and said ilanged portion having` flat Contact faces, With the :faces disposed at other than a right angle from the radial line through the bolt bisecting said faces.

4. A rail bolt comprising a shank, a

flanged portion integral with the shank and a bolt head, said flanged portion lying Ybetween the bolt head and the shank, and sn 'rl lianged portion being shaped as an c gated and non-rectangnlar parallelogr; for the purpose described. l

MART J. MADLVSON. 

